KR20220050480A - Sound insulating material with improved sound insulation performance, and sound absorbing and insulating material comprising the same - Google Patents

Sound insulating material with improved sound insulation performance, and sound absorbing and insulating material comprising the same Download PDF

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KR20220050480A
KR20220050480A KR1020200134213A KR20200134213A KR20220050480A KR 20220050480 A KR20220050480 A KR 20220050480A KR 1020200134213 A KR1020200134213 A KR 1020200134213A KR 20200134213 A KR20200134213 A KR 20200134213A KR 20220050480 A KR20220050480 A KR 20220050480A
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South Korea
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sound
insulating material
layer
absorbing
specific gravity
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KR1020200134213A
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Korean (ko)
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김성제
김지완
이정욱
김근영
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현대자동차주식회사
기아 주식회사
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Priority to KR1020200134213A priority Critical patent/KR20220050480A/en
Priority to US17/217,844 priority patent/US20220118749A1/en
Publication of KR20220050480A publication Critical patent/KR20220050480A/en

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Abstract

A sound insulating material according to the present invention is manufactured with a unique mixing ratio, so as to increase specific gravity while reducing the thickness, and thus reduce the specific gravity while increasing the thickness of the sound-absorbing layer in the sound absorbing and insulating material including the same, thereby improving sound insulation and sound absorption performance while reducing weight and manufacturing cost compared to existing parts, applying the resulting sound absorbing and insulating material to a dash isolation pad, a tunnel pad, or a floor carpet, and improving the performance of vehicle noise, vibration and harshness (NVH), and satisfying the emotional quality of consumers.

Description

차음 성능이 향상된 차음재, 및 이를 포함하는 흡차음재{Sound insulating material with improved sound insulation performance, and sound absorbing and insulating material comprising the same}Sound insulating material with improved sound insulation performance, and sound absorbing and insulating material comprising the same

본 발명은 차음 성능이 향상된 차음재, 및 이를 포함하는 다층구조의 흡차음재에 관한 것이다.The present invention relates to a sound insulating material having improved sound insulating performance, and to a sound absorbing and insulating material having a multilayer structure including the same.

차량의 엔진룸에서 발생하는 소음 저감을 위해, 차체 실내 방향에 대시 이너 (대시 아이소 패드) 부품이 적용되고 있다. 대시 이너 부품은 차체에 결합이 되고, 소음을 효율적으로 감소하기 위해 다층 구조로 적용 중이다. 일반적으로, 소재 구성은 하드층과 소프트층으로 구분되어 있으며 소프트층에는 우레탄 폼이 적용되고 있다. 하드층의 구성은 차음재 단일층으로 구성되기도 하지만, 소음 저감을 향상시키기 위해서는 보통 복합층으로 구성되어 왔다.In order to reduce noise generated from the engine room of a vehicle, dash inner (dash iso pad) parts are applied to the interior of the vehicle body. The dash inner part is coupled to the body and is applied in a multi-layered structure to effectively reduce noise. In general, the material composition is divided into a hard layer and a soft layer, and urethane foam is applied to the soft layer. The structure of the hard layer is sometimes composed of a single layer of sound insulating material, but in order to improve noise reduction, it is usually composed of a composite layer.

기존 종래에는, 단일 소재만의 특성에 초점이 맞춰 진행되었다. 하드층 내 포함될 수 있는 복합층 중 고강성 PET 층 개발은 원사 형상을 변경시켜 흡음 성능을 향상시켰지만, 원가가 상승하는 문제점이 있었고, 복합층에서 차음재 두께가 증대되면 흡음 성능이 저하되는 문제가 있었다. 한편, 소프트층 개발의 경우, 부품의 중량은 절감됐으나, 부품에서의 흡차음 성능 개선은 미미한 문제점이 있었다.In the prior art, the focus was on the characteristics of only a single material. Among the composite layers that can be included in the hard layer, the development of the high-stiffness PET layer improved the sound absorption performance by changing the yarn shape, but there was a problem in that the cost increased, and when the thickness of the sound insulation material in the composite layer increased, there was a problem that the sound absorption performance was lowered. . On the other hand, in the case of the development of the soft layer, the weight of the parts was reduced, but there was a slight problem in the improvement of the sound absorbing and insulating performance of the parts.

또한, 종래에는 다층 구조로 되어 있는 흡차음재 내 각 층의 두께 인자는 고려되지 않고 개발되고 있는 추세였다. 특히 흡음층의 경우, 원사 자체의 특성이나 중량이 중요하지만 두께가 매우 중요한 인자이다. 구체적으로, 흡음층의 두께는 차음층의 두께에 의해 영향을 받게 되고, 차음재 두께가 높을수록 흡음층의 두께는 감소하여 흡음 성능이 저하되게 된다. 따라서, 흡음층의 두께를 증대시키는 방법은 부품의 전체 두께를 향상 시키는 방법이 있으나, 차량 레이아웃에 의한 부품 두께 증대는 쉽지 않다. 다른 방법은 차음재의 두께를 줄이는 방법인데, 차음재의 두께가 줄면 차음재 중량이 감소해 차음 성능이 감소하게 된다.Also, in the prior art, the thickness factor of each layer in the sound absorbing and insulating material having a multi-layer structure has been developed without considering it. In particular, in the case of a sound-absorbing layer, the properties and weight of the yarn itself are important, but the thickness is a very important factor. Specifically, the thickness of the sound-absorbing layer is affected by the thickness of the sound-insulating layer, and as the thickness of the sound-insulating material increases, the thickness of the sound-absorbing layer decreases, thereby deteriorating the sound-absorbing performance. Therefore, as a method of increasing the thickness of the sound-absorbing layer, there is a method of improving the overall thickness of the component, but increasing the thickness of the component by the vehicle layout is not easy. Another method is to reduce the thickness of the sound insulation material. If the thickness of the sound insulation material is reduced, the weight of the sound insulation material decreases and thus the sound insulation performance decreases.

따라서, 흡음/차음 성능을 동시에 향상 시키는 신규 흡차음재 개발을 위해, 신규 차음재 배합, 및 이를 포함하는 흡차음재의 다층구조를 개발이 시급한 실정이었다.Therefore, in order to develop a new sound absorbing and insulating material that simultaneously improves sound absorbing/insulating performance, it is urgent to develop a new sound absorbing and insulating material formulation and a multi-layered structure of the sound absorbing and insulating material including the same.

대한민국 등록특허공보 10-1411398Republic of Korea Patent Publication No. 10-1411398

본 발명은 위와 같은 문제점을 해결하기 위한 것으로서, 그 구체적인 목적은 다음과 같다.The present invention is intended to solve the above problems, and the specific objects thereof are as follows.

흡차음재 내 흡음층의 두께 증대를 통해 흡음 성능을 향상시키기 위해, 두께는 감소하면서도 차음재의 성능 유지를 위해 비중이 증대된 차음재를 제공하는 것을 목적으로 한다.An object of the present invention is to provide a sound insulating material having an increased specific gravity in order to maintain the performance of the sound insulating material while reducing the thickness in order to improve sound absorption performance by increasing the thickness of the sound absorption layer in the sound absorption and insulating material.

또한, 상기 차음재를 포함하여 흡음층의 두께가 증대되어 차음성능 뿐만 아니라 흡음 성능까지 향상된 흡차음재, 및 이로부터 제조된 아이솔레이션 패드, 터널패드, 또는 플로어 카페트를 제공하는 것을 목적으로 한다.Another object of the present invention is to provide a sound absorbing and insulating material with improved sound absorbing and insulating properties as well as sound absorbing and insulating properties by increasing the thickness of the sound absorbing layer including the sound insulating material, and an isolation pad, tunnel pad, or floor carpet manufactured therefrom.

본 발명의 목적은 이상에서 언급한 목적으로 제한되지 않는다. 본 발명의 목적은 이하의 설명으로 보다 분명해 질 것이며, 특허청구범위에 기재된 수단 및 그 조합으로 실현될 것이다.The object of the present invention is not limited to the object mentioned above. The object of the present invention will become clearer from the following description, and will be realized by means and combinations thereof described in the claims.

본 발명의 일 실시예에 따른 차음재는 열가소성 올레핀(Thermoplastic olefin; TPO), 및 폴리올레핀 엘라스토머(Polyolefin elastomer; POE)를 포함하는 베이스 수지 16~24중량%; 및 무기필러 76~84중량%를 포함한다.The sound insulating material according to an embodiment of the present invention comprises 16 to 24 wt% of a base resin including a thermoplastic olefin (TPO) and a polyolefin elastomer (POE); and 76 to 84% by weight of inorganic fillers.

상기 베이스 수지는 차음재 전체 중량을 기준으로 상기 TPO 11~16중량%; 및상기 POE 5~8중량%를 포함할 수 있다.The base resin may include: 11 to 16% by weight of the TPO based on the total weight of the sound insulating material; and 5 to 8% by weight of the POE.

상기 TPO의 용융지수(Melt index; MI)는 15~25g/10분일 수 있다.Melt index (MI) of the TPO may be 15 ~ 25g / 10 minutes.

상기 TPO는 저밀도 폴리에틸렌(Low Density Polyethylene; LDPE), 선형 저밀도폴리에틸렌(Linear Low Density Polyethylene; LLDPE), 고밀도 폴리에틸렌(High Density Polyethylene; HDPE), 에틸렌 비닐아세테이트(Ethylene Vinyl Acetate; EVA), 및 에틸렌 프로필렌 고무(EPM, EPDM)로 이루어진 군으로부터 선택된 1종 이상을 포함할 수 있다.The TPO is low density polyethylene (Low Density Polyethylene; LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE), ethylene vinyl acetate (Ethylene Vinyl Acetate; EVA), and ethylene propylene rubber (EPM, EPDM) may include one or more selected from the group consisting of.

상기 POE의 용융지수(Melt index; MI)는 25~35g/10분일 수 있다.Melt index (MI) of the POE may be 25 ~ 35g / 10 minutes.

상기 POE는 에틸렌-부텐(ethylene-butene) 공중합체, 및 에틸렌-옥텐(ethylene-octene) 공중합체로 이루어진 군으로부터 선택된 1종 이상을 포함할 수 있다.The POE may include at least one selected from the group consisting of an ethylene-butene copolymer, and an ethylene-octene copolymer.

상기 무기필러는 황화바륨(BaSO4)을 포함할 수 있다.The inorganic filler may include barium sulfide (BaSO 4 ).

상기 무기필러는 입경이 5μm 이하일 수 있다.The inorganic filler may have a particle diameter of 5 μm or less.

상기 차음재는 비중이 2.5 이상일 수 있다.The specific gravity of the sound insulating material may be 2.5 or more.

본 발명의 일 실시예에 따른 흡차음재는 상기 차음재를 포함하는 차음층과 상기 차음층 상의 일면에 위치한 섬유층을 포함하는 하드층, 및 상기 차음층 상의 타면에 위치한 소프트층을 포함한다.A sound absorbing and insulating material according to an embodiment of the present invention includes a sound insulating layer including the sound insulating material, a hard layer including a fibrous layer on one surface of the sound insulating layer, and a soft layer on the other surface of the sound insulating layer.

상기 섬유층의 두께는 2.5~5mm일 수 있고, 비중은 800~1400g/cm2일 수 있다.The thickness of the fiber layer may be 2.5 ~ 5mm, specific gravity 800 ~ 1400g / cm 2 It may be.

본 발명의 일 실시예에 따른 대쉬 아이솔레이션 패드, 터널패드, 또는 플로어 카페트는 상기 흡차음재를 포함한다.A dash isolation pad, a tunnel pad, or a floor carpet according to an embodiment of the present invention includes the sound absorbing and insulating material.

차음 성능이 향상된 차음재, 및 이를 포함하는 다층구조의 흡차음재에 관한 것으로써, 본 발명에 따른 차음재는 특유한 배합비율로 제조되어 두께를 줄이면서도 비중을 증대시킬 수 있고, 그에 따라 이를 포함하는 흡차음재 내 흡음층의 두께를 상대적으로 두껍게 증대시키면서도 비중을 줄일 수 있으므로 기존 부품에 비해 중량 및 제조원가가 절감되면서도 차음성능 및 흡음 성능을 향상시킬 수 있다는 장점이 있고, 이에 따라 본 발명에 따른 흡차음재를 대쉬 아이솔레이션 패드, 터널패드, 또는 플로어 카페트에 적용하여 차량의 NVH(Noise, Vibration, Harshness) 성능 개선을 통해 소비자의 감성 품질 또한 만족시킬 수 있다.The present invention relates to a sound insulating material having improved sound insulation performance and a sound absorbing and insulating material having a multi-layer structure comprising the same, wherein the sound insulating material according to the present invention can be manufactured in a unique mixing ratio to reduce thickness and increase specific gravity, and thus a sound absorbing and insulating material comprising the same Since the specific gravity can be reduced while increasing the thickness of the sound-absorbing layer relatively thick, there is an advantage in that the sound-insulating performance and sound-absorbing performance can be improved while reducing the weight and manufacturing cost compared to existing parts. It can also be applied to isolation pads, tunnel pads, or floor carpets to improve the NVH (Noise, Vibration, Harshness) performance of the vehicle to satisfy the emotional quality of consumers.

본 발명의 효과는 이상에서 언급한 효과로 한정되지 않는다. 본 발명의 효과는 이하의 설명에서 추론 가능한 모든 효과를 포함하는 것으로 이해되어야 할 것이다.The effects of the present invention are not limited to the above-mentioned effects. It should be understood that the effects of the present invention include all effects that can be inferred from the following description.

도 1a는 본 발명의 실시예 2, 비교예 2-1, 및 비교예 2-2에 따라 제조한 흡차음재의 흡음 성능 평가 결과를 나타낸 그래프이다.
도 1b는 본 발명의 실시예 2, 비교예 2-1, 및 비교예 2-2에 따라 제조한 흡차음재의 차음 성능 평가 결과를 나타낸 그래프이다.
도 2a는 본 발명의 실시예 3, 및 비교예 3에 따라 제조한 대쉬 아이솔레이션 패드의 흡음 성능 평가 결과를 나타낸 그래프이다.
도 2b는 본 발명의 실시예 3, 및 비교예 3에 따라 제조한 대쉬 아이솔레이션 패드의 차음 성능 평가 결과를 나타낸 그래프이다.
도 3a는 본 발명의 실시예 4, 및 비교예 3에 따라 제조한 대쉬 아이솔레이션 패드의 흡음 성능 평가 결과를 나타낸 그래프이다.
도 3b는 본 발명의 실시예 4, 및 비교예 3에 따라 제조한 대쉬 아이솔레이션 패드의 차음 성능 평가 결과를 나타낸 그래프이다.1A is a graph showing evaluation results of sound absorption performance of sound absorbing and insulating materials prepared according to Example 2, Comparative Example 2-1, and Comparative Example 2-2 of the present invention.
1B is a graph showing results of evaluation of sound insulation performance of sound absorbing and insulating materials prepared according to Example 2, Comparative Example 2-1, and Comparative Example 2-2 of the present invention.
Figure 2a is a graph showing the sound absorption performance evaluation results of the dash isolation pad prepared according to Example 3 and Comparative Example 3 of the present invention.
2B is a graph showing the results of evaluation of sound insulation performance of dash isolation pads manufactured according to Example 3 and Comparative Example 3 of the present invention.
Figure 3a is a graph showing the sound absorption performance evaluation results of the dash isolation pad prepared according to Example 4 and Comparative Example 3 of the present invention.
3B is a graph showing the results of evaluation of sound insulation performance of dash isolation pads manufactured according to Example 4 and Comparative Example 3 of the present invention.

이상의 본 발명의 목적들, 다른 목적들, 특징들 및 이점들은 첨부된 도면과 관련된 이하의 바람직한 실시예들을 통해서 쉽게 이해될 것이다. 그러나 본 발명은 여기서 설명되는 실시예들에 한정되지 않고 다른 형태로 구체화될 수도 있다. 오히려, 여기서 소개되는 실시예들은 개시된 내용이 철저하고 완전해질 수 있도록 그리고 통상의 기술자에게 본 발명의 사상이 충분히 전달될 수 있도록 하기 위해 제공되는 것이다.The above objects, other objects, features and advantages of the present invention will be easily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed subject matter may be thorough and complete, and that the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

본 명세서에서, "포함하다" 또는 "가지다" 등의 용어는 명세서 상에 기재된 특징, 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것이 존재함을 지정하려는 것이지, 하나 또는 그 이상의 다른 특징들이나 숫자, 단계, 동작, 구성요소, 부분품 또는 이들을 조합한 것들의 존재 또는 부가 가능성을 미리 배제하지 않는 것으로 이해되어야 한다. 또한, 층, 막, 영역, 판 등의 부분이 다른 부분 "상에" 있다고 할 경우, 이는 다른 부분 "바로 위에" 있는 경우뿐만 아니라 그 중간에 또 다른 부분이 있는 경우도 포함한다. 반대로 층, 막, 영역, 판 등의 부분이 다른 부분 "하부에" 있다고 할 경우, 이는 다른 부분 "바로 아래에" 있는 경우뿐만 아니라 그 중간에 또 다른 부분이 있는 경우도 포함한다.In this specification, terms such as "comprise" or "have" are intended to designate that a feature, number, step, operation, component, part, or a combination thereof described in the specification exists, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof. Also, when a part of a layer, film, region, plate, etc. is said to be “on” another part, it includes not only the case where the other part is “directly on” but also the case where there is another part in between. Conversely, when a part, such as a layer, film, region, plate, etc., is "under" another part, this includes not only cases where it is "directly under" another part, but also a case where another part is in the middle.

달리 명시되지 않는 한, 본 명세서에서 사용된 성분, 반응 조건, 폴리머 조성물 및 배합물의 양을 표현하는 모든 숫자, 값 및/또는 표현은, 이러한 숫자들이 본질적으로 다른 것들 중에서 이러한 값을 얻는 데 발생하는 측정의 다양한 불확실성이 반영된 근사치들이므로, 모든 경우 "약"이라는 용어에 의해 수식되는 것으로 이해되어야 한다. 또한, 본 기재에서 수치범위가 개시되는 경우, 이러한 범위는 연속적이며, 달리 지적되지 않는 한 이러한 범 위의 최소값으로부터 최대값이 포함된 상기 최대값까지의 모든 값을 포함한다. 더 나아가, 이러한 범위가 정수를 지칭하는 경우, 달리 지적되지 않는 한 최소값으로부터 최대값이 포함된 상기 최대값까지를 포함하는 모든 정수가 포함된다.Unless otherwise specified, all numbers, values, and/or expressions expressing quantities of ingredients, reaction conditions, polymer compositions and formulations used herein, contain all numbers, values and/or expressions in which such numbers essentially occur in obtaining such values, among others. Since they are approximations reflecting various uncertainties in the measurement, it should be understood as being modified by the term "about" in all cases. Also, where the disclosure discloses numerical ranges, such ranges are continuous and inclusive of all values from the minimum to the maximum inclusive of the range, unless otherwise indicated. Furthermore, when such ranges refer to integers, all integers inclusive from the minimum to the maximum inclusive are included, unless otherwise indicated.

본 명세서에 있어서, 범위가 변수에 대해 기재되는 경우, 상기 변수는 상기 범위의 기재된 종료점들을 포함하는 기재된 범위 내의 모든 값들을 포함하는 것으로 이해될 것이다. 예를 들면, "5 내지 10"의 범위는 5, 6, 7, 8, 9, 및 10의 값들뿐만 아니라 6 내지 10, 7 내지 10, 6 내지 9, 7 내지 9 등의 임의의 하위 범위를 포함하고, 5.5, 6.5, 7.5, 5.5 내지 8.5 및 6.5 내지 9 등과 같은 기재된 범위의 범주에 타당한 정수들 사이의 임의의 값도 포함하는 것으로 이해될 것이다. 또한 예를 들면, "10% 내지 30%"의 범위는 10%, 11%, 12%, 13% 등의 값들과 30%까지를 포함하는 모든 정수들뿐만 아니라 10% 내지 15%, 12% 내지 18%, 20% 내지 30% 등의 임의의 하위 범위를 포함하고, 10.5%, 15.5%, 25.5% 등과 같이 기재된 범위의 범주 내의 타당한 정수들 사이의 임의의 값도 포함하는 것으로 이해될 것이다.In this specification, when a range is described for a variable, the variable will be understood to include all values within the stated range including the stated endpoints of the range. For example, a range of “5 to 10” includes the values of 5, 6, 7, 8, 9, and 10, as well as any subranges such as 6 to 10, 7 to 10, 6 to 9, 7 to 9, etc. It will be understood to include any value between integers that are appropriate for the scope of the recited range, such as 5.5, 6.5, 7.5, 5.5 to 8.5 and 6.5 to 9, and the like. Also for example, ranges from "10% to 30%" include values of 10%, 11%, 12%, 13%, etc. and all integers up to and including 30%, as well as 10% to 15%, 12% to It will be understood to include any subranges such as 18%, 20% to 30%, etc., as well as any value between reasonable integers within the scope of the recited ranges, such as 10.5%, 15.5%, 25.5%, and the like.

종래에는 다층 구조로 되어 있는 흡차음재 내 각 층의 두께 인자는 고려되지 않고 흡차음성 향상을 위해 다층 구조 내 성분 등이 개발되고 있는 실정이었다. 이에 따라, 본 발명자는 흡음성을 향상시키기 위해 흡음층의 두께를 증대시키는 방법에 관하여 연구한 결과, 차음재의 두께를 줄이면 차음재의 두께가 줄 수 있으나 차음재 중량이 감소해 차음 성능이 감소할 수 있으므로, 종래기술 대비 두께를 1mm 이상 감소시키면서도 비중을 높여 차음성능을 유지시킬 수 있는 차음재를 개발하였다. 구체적으로, 종래기술의 차음재는 비중이 1.5가 적용되고 있었고, 비중을 높이려면 무기물 함량을 증가시켜야 하나, 기존 CaCO3의 함량을 단순히 증가시켜 비중을 높이는 데는 한계가 있었다. 또한, 기존의 배합에서 단순히 무기물 함량 증대 시 크랙이 발생할 수 있고 비중도 2.0 이상을 확보하기가 어려운 문제점이 있었다. 이에 본 발명자는 상기 문제점을 해결하기 위해 예의 연구한 결과, 두께를 1mm 이상 감소시키면서도 비중을 높이기 위해, 특정 성분 및 함량을 만족하는 베이스 수지와 기존 무기물 CaCO3 대신 특정 함량 및 스펙을 만족하는 신규 무기물을 배합한 차음재를 개발하여 본 발명을 완성하였다.Conventionally, the thickness factor of each layer in a sound absorbing and insulating material having a multi-layer structure is not considered, and components in a multi-layer structure are being developed to improve sound absorbing and insulating properties. Accordingly, the present inventors have studied a method of increasing the thickness of the sound-absorbing layer to improve the sound-absorbing property. As a result, if the thickness of the sound-insulating material is reduced, the thickness of the sound-insulating material may be reduced, but the sound-insulating performance may be reduced due to the reduction in the weight of the sound-insulating material, A sound insulating material that can maintain sound insulation performance by increasing specific gravity while reducing the thickness by 1 mm or more compared to the prior art has been developed. Specifically, the specific gravity of the sound insulating material of the prior art was 1.5, and in order to increase the specific gravity, the inorganic material content had to be increased, but there was a limit to increasing the specific gravity by simply increasing the existing CaCO3 content. In addition, there was a problem in that cracks may occur when the inorganic content is simply increased in the conventional formulation, and it is difficult to secure a specific gravity of 2.0 or more. Accordingly, the present inventors have studied diligently to solve the above problems, and as a result, in order to increase specific gravity while reducing the thickness by 1 mm or more, a base resin satisfying a specific component and content and a new inorganic material satisfying a specific content and specification instead of the existing inorganic CaCO 3 The present invention was completed by developing a sound insulating material containing

차음재sound insulation

본 발명의 일 실시예에 따른 차음재는 열가소성 올레핀(Thermoplastic olefin; TPO), 및 폴리올레핀 엘라스토머(Polyolefin elastomer; POE)를 포함하는 베이스 수지; 및 무기필러 포함한다. 바람직하게는 열가소성 올레핀(Thermoplastic olefin; TPO), 및 폴리올레핀 엘라스토머(Polyolefin elastomer; POE)를 포함하는 베이스 수지 16~24중량%; 및 무기필러 76~84중량%를 포함한다.A sound insulating material according to an embodiment of the present invention includes a base resin including a thermoplastic olefin (TPO) and a polyolefin elastomer (POE); and inorganic fillers. Preferably, 16 to 24% by weight of a base resin comprising a thermoplastic olefin (TPO), and a polyolefin elastomer (POE); and 76 to 84% by weight of inorganic fillers.

본 발명의 일 실시예에 따른 베이스 수지는 열가소성 올레핀(Thermoplastic olefin; TPO), 및 폴리올레핀 엘라스토머(Polyolefin elastomer; POE)를 포함하고, 상기 베이스 수지를 포함하는 차음재의 비중을 높이기 위해 사용하는 무기필러를 적절히 분산시킬 수 있으면서도 차음재의 물성을 유지할 수 있는 것이라면 특별히 제한되지 않는다.The base resin according to an embodiment of the present invention includes a thermoplastic olefin (TPO) and a polyolefin elastomer (POE), and an inorganic filler used to increase the specific gravity of the sound insulating material including the base resin. It is not particularly limited as long as it can properly disperse and maintain the physical properties of the sound insulating material.

본 발명에 따른 베이스 수지에 포함된 열가소성 올레핀(Thermoplastic olefin; TPO)은 본 발명에서 사용할 수 있는 TPO, 예를 들어, 저밀도 폴리에틸렌(Low Density Polyethylene; LDPE), 선형 저밀도폴리에틸렌(Linear Low Density Polyethylene; LLDPE), 고밀도 폴리에틸렌(High Density Polyethylene; HDPE), 에틸렌 비닐아세테이트(Ethylene Vinyl Acetate; EVA) 등의 폴리올레핀(Polyolefin) 및 에틸렌 프로필렌 고무(EPM, EPDM)로 이루어진 군으로부터 선택된 1종 이상을 포함할 수 있고 특정 성분을 포함하는 것으로 제한되지 아니하나, 바람직하게는 생산성 및 성형성이 우수한 LLDPE와 EPDM을 포함할 수 있다.The thermoplastic olefin (TPO) contained in the base resin according to the present invention is TPO that can be used in the present invention, for example, low density polyethylene (LDPE), linear low density polyethylene (LLDPE). ), high-density polyethylene (HDPE), polyolefin such as ethylene vinyl acetate (EVA), and ethylene propylene rubber (EPM, EPDM) It may contain at least one selected from the group consisting of, and It is not limited to including a specific component, but may preferably include LLDPE and EPDM having excellent productivity and moldability.

본 발명에 따른 베이스 수지에 포함된 폴리올레핀 엘라스토머(Polyolefin elastomer; POE)은 본 발명에서 사용할 수 있는 POE, 예를 들어, 에틸렌-부텐(ethylene-butene) 공중합체, 및 에틸렌-옥텐(ethylene-octene) 공중합체로 이루어진 군으로부터 선택된 1종 이상을 포함할 수 있고 특정 성분을 포함하는 것으로 제한되지 아니하나, 바람직하게는 흐름성이 좋아 성형성이 우수한 에틸렌-옥텐(ethylene-octene) 공중합체를 포함할 수 있다.Polyolefin elastomer (POE) contained in the base resin according to the present invention is a POE that can be used in the present invention, for example, an ethylene-butene copolymer, and ethylene-octene (ethylene-octene) It may include at least one selected from the group consisting of copolymers and is not limited to including a specific component, but preferably includes an ethylene-octene copolymer having good flowability and excellent moldability. can

본 발명의 일 실시예에 따른 베이스 수지는 차음재 전체 중량을 기준으로 상기 TPO 11~16중량%; 및 상기 POE 5~8중량%를 포함할 수 있다. 상기 TPO의 함량이 11중량% 미만이거나 상기 POE의 함량이 5중량% 미만이면 최종 흡차음재의 물성 확보가 어렵고, 상기 TPO의 함량이 16중량%을 초과하거나 상기 POE의 함량이 8중량%를 초과하면 무기필러의 함량이 상대적으로 감소하여 비중이 감소할 수 있다. 이에 따라, 본 발명에 따른 베이스 수지는 열가소성 올레핀(Thermoplastic olefin; TPO), 및 폴리올레핀 엘라스토머(Polyolefin elastomer; POE)를 차음재 전체 중량을 기준으로 16~24중량%을 포함하는 것이 바람직하다. The base resin according to an embodiment of the present invention includes 11 to 16% by weight of the TPO based on the total weight of the sound insulating material; and 5 to 8% by weight of the POE. When the TPO content is less than 11 wt% or the POE content is less than 5 wt%, it is difficult to secure the physical properties of the final sound absorbing and insulating material, and the TPO content exceeds 16 wt% or the POE content exceeds 8 wt% If the content of the inorganic filler is relatively reduced, the specific gravity may decrease. Accordingly, the base resin according to the present invention preferably contains 16 to 24 wt% of a thermoplastic olefin (TPO) and a polyolefin elastomer (POE) based on the total weight of the sound insulating material.

본 발명의 일 실시예에 따른 베이스 수지에 포함되는 용융지수(Melt index; MI)는, 이를 포함하는 차음재의 비중을 높이기 위한 무기필러의 함량 증가 및 분산성 향상을 위한 무기필러의 입경 크기를 감소시킴에도 차음재의 생산성 향상 및 물성 유지 및 보강을 위해, 구체적으로, 상기 TPO의 용융지수(Melt index; MI)는 15~25g/10분일 수 있고, 상기 POE의 용융지수(Melt index; MI)는 25~35g/10분일 수 있다. 상기 TPO의 MI가 15g/10분 미만이거나 POE의 MI가 25g/10분 미만이면 무기필러의 분산성이 저하되어 이를 포함하는 차음재의 표면에 크랙이 발생할 수 있고, 상기 TPO의 MI가 25g/10분을 초과하거나 POE의 MI가 35g/10분을 초과하면 이를 포함하는 차음재의 물성이 전체적으로 저하되어 부품 형상 유지에 불리한 단점이 있다.The melt index (MI) included in the base resin according to an embodiment of the present invention increases the content of the inorganic filler for increasing the specific gravity of the sound insulating material including the same and reduces the particle size of the inorganic filler for improving dispersibility In order to improve productivity and maintain and reinforce physical properties of the sound insulating material, specifically, the melt index (MI) of the TPO may be 15 to 25 g/10 min, and the melt index (MI) of the POE is 25-35 g/10 min. If the MI of the TPO is less than 15 g/10 min or the MI of the POE is less than 25 g/10 min, the dispersibility of the inorganic filler is lowered and cracks may occur on the surface of the sound insulating material including the same, and the MI of the TPO is 25 g/10 min. When the min or the MI of the POE exceeds 35 g/10 min, the physical properties of the sound insulating material including the same are reduced overall, which is disadvantageous in maintaining the shape of the part.

즉, 본 발명의 일 실시예에 따른 차음재 내 베이스 수지는 상기 특유한 배합비율, 및 상기 용융지수(Melt index; MI) 등의 특유한 특성을 갖는 TPO 및 POE로 제조되어 비중을 2.5 이상으로 증대시킬 수 있고, 그에 따라 이를 포함하는 흡차음재 내 흡음층의 두께를 상대적으로 두껍게 증대시킬 수 있으므로 기존 부품에 비해 중량 및 제조원가가 절감되면서도 차음성능 및 흡음 성능을 향상시킬 수 있다.That is, the base resin in the sound insulating material according to an embodiment of the present invention is made of TPO and POE having unique characteristics such as the above-mentioned unique blending ratio and the melt index (MI), so that the specific gravity can be increased to 2.5 or more. Accordingly, since the thickness of the sound absorbing layer in the sound absorbing and insulating material including the same can be increased relatively thickly, it is possible to improve the sound insulation and sound absorption performance while reducing the weight and manufacturing cost compared to existing parts.

본 발명의 일 실시예에 따른 무기필러는 이를 포함하는 차음재의 높은 비중을 확보하기 위한 물성을 확보하면서도 베이스 수지 내에 분산성이 확보하여 크랙을 발생시키지 않는 것이라면 특별히 제한되지 않는다.The inorganic filler according to an embodiment of the present invention is not particularly limited as long as it does not generate cracks by securing dispersibility in the base resin while securing physical properties for securing a high specific gravity of the sound insulating material including the same.

본 발명의 일 실시예에 따른 무기필러는 본 발명에서 사용할 수 있는 통상의 무기필러, 예를 들어, 황화바륨(BaSO4), 탄산칼슘,탈크,클레이,실리카,마이카, 운모,산화철,카올린클레이, 미분규산, 규회석, 산화마그네슘, 규조토, 세피오라이트, 산화알루미늄, 및 페라이트로 이루어진 군으로부터 선택된 1종 이상을 포함할 수 있고, 특정 성분을 포함하는 것으로 제한되지 않으나, 바람직하게는, 기존 배합에서 단순한 함량 증대 시 이를 포함한 차음재에 크랙이 발생할 수 있고 비중도 2.0 이상을 확보하기 어려우므로, 크랙 감소 및 이를 포함하는 차음재의 비중을 향상시킬 수 있는 황화바륨(BaSO4)를 포함할 수 있다.The inorganic filler according to an embodiment of the present invention is a conventional inorganic filler that can be used in the present invention, for example, barium sulfide (BaSO 4 ), calcium carbonate, talc, clay, silica, mica, mica, iron oxide, kaolin clay. , finely divided silicic acid, wollastonite, magnesium oxide, diatomaceous earth, sepiolite, aluminum oxide, and may include at least one selected from the group consisting of ferrite, and is not limited to including a specific component, but preferably, simple in the existing formulation. When the content is increased, cracks may occur in the sound insulating material including the same, and since it is difficult to secure a specific gravity of 2.0 or more, barium sulfide (BaSO 4 ), which can reduce cracks and improve the specific gravity of the sound insulating material including the same, may be included.

본 발명의 일 실시예에 따른 무기필러의 함량은 차음재 전체 중량을 기준으로 76~84중량%를 포함할 수 있다. 상기 무기필러의 함량이 76중량% 미만이면 이를 포함하는 차음재의 비중 확보가 어렵고, 상기 무기필러의 함량이 84중량%를 초과하면 무기필러의 분산성이 저하되어 이를 포함하는 차음재의 표면에 크랙이 발생할 수 있는 단점이 있다.The content of the inorganic filler according to an embodiment of the present invention may include 76 to 84% by weight based on the total weight of the sound insulating material. If the content of the inorganic filler is less than 76% by weight, it is difficult to secure the specific gravity of the sound insulating material including the same. There are drawbacks that may arise.

본 발명의 일 실시예에 따른 무기필러의 입경은 5μm 이하일 수 있고, 바람직하게는, 1~5μm일 수 있다. 상기 무기필러의 입경이 1μm 미만이거나, 5μm를 초과하면 무기필러의 분산성이 저하되어 이를 포함하는 차음재의 표면에 크랙이 발생할 수 있는 단점이 있다.The particle diameter of the inorganic filler according to an embodiment of the present invention may be 5 μm or less, preferably, 1-5 μm. When the particle diameter of the inorganic filler is less than 1 μm or exceeds 5 μm, the dispersibility of the inorganic filler is lowered, so that cracks may occur on the surface of the sound insulating material including the same.

즉, 본 발명의 일 실시예에 따른 차음재 내 무기필러는 상기 특유한 배합비율, 및 상기 입경 범위 등의 특유한 특성을 갖는 것으로 제조되어 비중을 2.5 이상으로 증대시킬 수 있고, 그에 따라 이를 포함하는 흡차음재 내 흡음층의 두께를 상대적으로 두껍게 증대시킬 수 있으므로 기존 부품에 비해 중량 및 제조원가가 절감되면서도 차음성능 및 흡음 성능을 향상시킬 수 있다.That is, the inorganic filler in the sound insulating material according to an embodiment of the present invention is manufactured to have unique characteristics such as the above-mentioned unique mixing ratio and the above-mentioned particle size range, so that the specific gravity can be increased to 2.5 or more, and accordingly, the sound absorbing and insulating material including the inorganic filler Since the thickness of the sound-absorbing layer can be increased relatively thickly, it is possible to improve the sound insulation and sound absorption performance while reducing the weight and manufacturing cost compared to existing parts.

흡차음재sound absorbing and insulating material

본 발명의 일 실시예에 따른 흡차음재는 상기 본 발명의 일 실시예에 따른 차음재를 포함하는 차음층과 상기 차음층 상의 일면에 위치한 섬유층을 포함하는 하드층; 및 상기 차음층 상의 타면에 위치한 소프트층을 포함한다.A sound absorbing and insulating material according to an embodiment of the present invention includes: a hard layer including a sound insulating layer including the sound insulating material according to the embodiment of the present invention and a fibrous layer disposed on one surface of the sound insulating layer; and a soft layer positioned on the other surface of the sound insulating layer.

본 발명의 일 실시예에 따른 소프트층은 상기 차음층 상의 타면에 위치하여 흡음층으로써의 역할을 할 수 있는 것이라면 특별히 제한되지 않는다. 본 발명의 일 실시예에 따른 소프트층은 본 발명에서 사용할 수 있는 통상의 층, 예를 들어, PU 폼, 폴리에틸렌 섬유, 폴리프로필렌 섬유, 잡사 펠트, 또는 레진 펠트 등을 포함할 수 있고, 특정 재료를 포함하는 것으로 제한되지 아니하나, 바람직하게는 흡차음 성능이 뛰어나고 부품 매칭성이 뛰어난 PU 폼을 포함할 수 있다.The soft layer according to an embodiment of the present invention is not particularly limited as long as it is located on the other surface of the sound insulating layer and can serve as a sound absorbing layer. The soft layer according to an embodiment of the present invention may include a conventional layer that can be used in the present invention, for example, PU foam, polyethylene fiber, polypropylene fiber, miscellaneous felt, or resin felt, and a specific material. Although not limited to including, preferably, it may include a PU foam excellent in sound absorbing and insulating performance and excellent in component matching.

본 발명의 일 실시예에 따른 흡차음재 내 차음층에 포함된 차음재는 상기 기재된 내용과 동일하거나 다를 수 있다. 즉, 본 발명의 일 실시예에 따른 차음층은 상기 기재된 내용을 포함한 특징이 있으므로, 비중이 1.5~2.5로 증대되고, 두께가 1.5~2.5mm로 얇아질 수 있으므로, 두께를 줄이면서도 비중을 증대시킬 수 있고, 그에 따라 이를 포함하는 흡차음재 내 흡음층의 두께를 상대적으로 두껍게 증대시킬 수 있으므로 기존 부품에 비해 중량 및 제조원가가 절감되면서도 차음성능 및 흡음 성능을 향상시킬 수 있다는 장점이 있다.The sound insulating material included in the sound insulating layer in the sound absorbing and insulating material according to an embodiment of the present invention may be the same as or different from that described above. That is, since the sound insulating layer according to an embodiment of the present invention has the characteristics including the above-described contents, the specific gravity is increased to 1.5 to 2.5, and the thickness can be reduced to 1.5 to 2.5 mm, so that the specific gravity is increased while reducing the thickness As a result, the thickness of the sound-absorbing layer in the sound-absorbing and insulating material including the same can be increased relatively thickly, thereby reducing the weight and manufacturing cost compared to existing parts, while improving the sound-insulating performance and sound-absorbing performance.

본 발명의 일 실시예에 따른 섬유층은 흡차음재의 하드층 내에 포함되어 흡음층으로써의 역할을 할 수 있는 것이라면 특별히 제한되지 않는다. 본 발명의 일 실시예에 따른 섬유층은 본 발명에서 사용할 수 있는 통상의 섬유층, 예를 들어, PET 섬유, PP 섬유, 나일론 섬유, 및 잡사 펠트를 포함할 수 있고, 특정 섬유를 포함하는 것으로 제한되지 아니하나, 바람직하게는 내열성 및 부품 성형성이 우수한 PET 섬유를 포함할 수 있다.The fibrous layer according to an embodiment of the present invention is not particularly limited as long as it is included in the hard layer of the sound absorbing and insulating material and can serve as the sound absorbing layer. The fiber layer according to an embodiment of the present invention may include a conventional fiber layer that can be used in the present invention, for example, PET fiber, PP fiber, nylon fiber, and miscellaneous felt, and is not limited to including specific fibers. No, preferably, it may include PET fibers having excellent heat resistance and part moldability.

본 발명의 일 실시예 따른 섬유층은 상기 차음층의 두께 감소 및 비중 증가로 인해 종래기술에 비해 두께 증가 및 비중을 감소시킬 수 있다. 구체적으로, 섬유층의 두께는 2.5~5mm일 수 있고, 상기 섬유층의 비중은 800~1400g/cm2일 수 있다. 즉, 본 발명의 일 실시예에 따른 흡차음재는 이에 포함된 차음층의 두께 감소 및 비중 증가로 인해 흡차음재 내 흡음층의 두께를 종래기술이 비해 상대적으로 두껍게 증대시키면서도 비중을 상대적으로 감소시킬 수 있으므로 기존 부품에 비해 중량 및 제조원가가 절감되면서도 차음성능 및 흡음 성능을 향상시킬 수 있다는 장점이 있다.The fibrous layer according to an embodiment of the present invention may have an increase in thickness and a decrease in specific gravity compared to the prior art due to the decrease in thickness and increase in specific gravity of the sound insulating layer. Specifically, the thickness of the fiber layer may be 2.5 ~ 5mm, the specific gravity of the fiber layer may be 800 ~ 1400 g / cm 2 . That is, in the sound absorbing and insulating material according to an embodiment of the present invention, the thickness of the sound absorbing and insulating layer in the sound absorbing and insulating material is relatively increased compared to that of the prior art due to the decrease in the thickness and the increase in specific gravity of the sound insulating layer included therein. Therefore, it has the advantage of being able to improve sound insulation performance and sound absorption performance while reducing weight and manufacturing cost compared to existing parts.

상기 특징을 만족하는 본 발명의 일 실시예에 따른 흡차음재는 차량 차체에 장착되어 적용되는 부품에 모두 적용될 수 있고, 예를 들어, 대쉬 아이솔레이션 패드, 터널패드, 또는 플로어 카페트 등 대면적부터 소면적으로 적용될 수 있는 부품에 모두 적용이 가능하며, 이에 따라, 차량의 NVH(Noise, Vibration, Harshness) 성능 개선을 통해 소비자의 감성 품질 또한 만족시킬 수 있는 장점이 있다.The sound absorbing and insulating material according to an embodiment of the present invention satisfying the above characteristics can be applied to all parts mounted and applied to a vehicle body, for example, from a large area to a small area such as a dash isolation pad, a tunnel pad, or a floor carpet. It can be applied to all applicable parts, and accordingly, it has the advantage of satisfying the emotional quality of consumers by improving the NVH (Noise, Vibration, Harshness) performance of the vehicle.

이하 실시예를 통해 본 발명을 보다 구체적으로 설명한다. 하기 실시예는 본 발명의 이해를 돕기 위한 예시에 불과하며, 본 발명의 범위가 이에 한정되는 것은 아니다.The present invention will be described in more detail with reference to the following examples. The following examples are only examples to help the understanding of the present invention, and the scope of the present invention is not limited thereto.

실시예 1 : 본 발명의 함량 및 특성을 만족하는 차음재Example 1: Sound insulating material satisfying the content and characteristics of the present invention

본 발명의 일 실시예에 따른 차음재를 제조하였다. 구체적으로, 베이스 수지는 하기와 같이 준비하였다. 즉, 열가소성 올레핀(Thermoplastic olefin; TPO)로 LLDPE 및 EPDM(용융지수(Melt index; MI) 15g/10분) 15중량%과 폴리올레핀 엘라스토머(Polyolefin elastomer; POE)로 에틸렌-옥텐(ethylene-octene) 공중합체(용융지수(Melt index; MI) 30g/10분) 5중량% 준비하였다. 또한, 무기필러로 BaSO4(입자 크기가 5μm) 80중량%을 준비하였다. 결과적으로, 상기 함량 및 특성을 갖는 베이스 수지 및 무기필러를 배합한 뒤 T-die 압출 공법(온도 180℃)으로 차음재를 제조하였다.A sound insulating material according to an embodiment of the present invention was manufactured. Specifically, the base resin was prepared as follows. That is, 15 wt% of LLDPE and EPDM (melt index (MI) 15 g/10 min) as a thermoplastic olefin (TPO) and ethylene-octene air as a polyolefin elastomer (POE) 5% by weight of the coalescence (melt index (MI) 30 g/10 min) was prepared. In addition, 80% by weight of BaSO 4 (particle size of 5 μm) was prepared as an inorganic filler. As a result, a sound insulating material was manufactured by a T-die extrusion method (temperature 180° C.) after mixing the base resin and inorganic filler having the above content and characteristics.

비교예 1-1 내지 비교예 1-4 : 본 발명의 특성을 벗어난 차음재Comparative Examples 1-1 to 1-4: Sound insulating material deviating from the characteristics of the present invention

실시예 1과 비교했을 때,When compared to Example 1,

비교예 1-1은 베이스 수지 내, TPO로 LLDPE 및 EPDM(용융지수(Melt index; MI) 5g/10분) 18~24중량%과 폴리올레핀 엘라스토머(Polyolefin elastomer; POE)로 에틸렌-옥텐(ethylene-octene) 공중합체(용융지수(Melt index; MI) 17g/10분) 12~18중량% 준비하였다. 또한, 무기필러로 CaCO3 58~63중량%을 준비한 것을 제외하고, 실시예 1과 동일하게 차음재를 제조하였고,Comparative Example 1-1 is 18 to 24 wt% of LLDPE and EPDM (melt index (MI) 5 g/10 min) as TPO in the base resin and ethylene-octene as polyolefin elastomer (POE) octene) copolymer (melt index (MI) 17g/10min) 12 to 18% by weight was prepared. In addition, a sound insulating material was prepared in the same manner as in Example 1, except that 58 to 63 wt% of CaCO 3 was prepared as an inorganic filler,

비교예 1-2는 베이스 수지 내, TPO로 LLDPE 및 EPDM(용융지수(Melt index; MI) 5g/10분) 18~24중량%과 폴리올레핀 엘라스토머(Polyolefin elastomer; POE)로 에틸렌-옥텐(ethylene-octene) 공중합체(용융지수(Melt index; MI) 17g/10분) 12~18중량% 준비하였다. 또한, 무기필러로 CaCO3 25~30중량%과 BaSO4(입자 크기가 23μm) 60중량%을 준비한 것을 제외하고, 실시예 1과 동일하게 차음재를 제조하였고,Comparative Example 1-2 is 18 to 24% by weight of LLDPE and EPDM (melt index (MI) 5 g/10 min) as TPO and ethylene-octene as polyolefin elastomer (POE) in the base resin. octene) copolymer (melt index (MI) 17 g/10 min) 12 to 18 wt% was prepared. In addition, a sound insulating material was prepared in the same manner as in Example 1, except that 25 to 30% by weight of CaCO 3 and 60% by weight of BaSO 4 (particle size of 23 μm) were prepared as inorganic fillers,

비교예 1-3는 베이스 수지 내, TPO로 LLDPE 및 EPDM(용융지수(Melt index; MI) 5g/10분) 11~13중량%과 폴리올레핀 엘라스토머(Polyolefin elastomer; POE)로 에틸렌-옥텐(ethylene-octene) 공중합체(용융지수(Melt index; MI) 17g/10분) 8~13중량% 준비하였다. 또한, 무기필러로 CaCO3 10~15중량%과 BaSO4(입자 크기가 23μm) 70~75중량%을 준비한 것을 제외하고, 실시예 1과 동일하게 차음재를 제조하였고,Comparative Example 1-3 is in the base resin, 11 to 13 wt% of LLDPE and EPDM (melt index (MI) 5 g/10 min) as TPO and ethylene-octene as polyolefin elastomer (POE) octene) copolymer (melt index (MI) 17 g/10 min) 8 to 13 wt% was prepared. In addition, a sound insulating material was prepared in the same manner as in Example 1, except that 10 to 15 wt% of CaCO 3 and 70 to 75 wt% of BaSO 4 (particle size of 23 μm) were prepared as inorganic fillers,

비교예 1-4는 베이스 수지 내, TPO로 LLDPE 및 EPDM(용융지수(Melt index; MI) 5g/10분) 9~11중량%과 폴리올레핀 엘라스토머(Polyolefin elastomer; POE)로 에틸렌-옥텐(ethylene-octene) 공중합체(용융지수(Melt index; MI) 17g/10분) 10~15중량% 준비하였다. 또한, 무기필러로 BaSO4(입자 크기가 5μm) 80중량%을 준비한 것을 제외하고, 실시예 1과 동일하게 차음재를 제조하였다.Comparative Example 1-4 is in the base resin, LLDPE and EPDM (melt index (MI) 5g/10 min) as TPO 9-11 wt% and polyolefin elastomer (POE) as ethylene-octene (ethylene- octene) copolymer (melt index (MI) 17 g/10 min) 10 to 15 wt% was prepared. In addition, a sound insulating material was prepared in the same manner as in Example 1, except that 80% by weight of BaSO 4 (particle size of 5 μm) was prepared as an inorganic filler.

실시예 2과 비교예 2-1 내지 비교예 2-2 : 차음재를 포함하는 흡차음재Example 2 and Comparative Examples 2-1 to 2-2: Sound absorbing and insulating material including sound insulating material

상기 실시예 1의 차음재를 포함하는 차음층을 하기 표 1과 같은 조건, 및 하드층을 일정 두께로 열 프레스 성형 후 PU폼 몰드 발포를 통해 흡차음재를 제조하였다.A sound absorbing and insulating material was prepared by hot press molding the sound insulating layer including the sound insulating material of Example 1 to a predetermined thickness under the conditions shown in Table 1 below, and then foaming the PU foam mold.

구분division 실시예2Example 2 비교예 2-1Comparative Example 2-1 비교예2-2Comparative Example 2-2 하드층hard layer 섬유층fiber layer PET 1200 g/㎡, 3.5mmPET 1200 g/m2, 3.5mm PET 1200 g/㎡, 2.5mmPET 1200 g/m2, 2.5mm PET 1200 g/㎡, 2.5mmPET 1200 g/m2, 2.5mm 차음층sound insulation layer TPE 비중 2.5, 1.5mmTPE specific gravity 2.5, 1.5mm TPE 비중 2.5, 1.5mmTPE specific gravity 2.5, 1.5mm TPE 비중 1.5, 2.5mmTPE specific gravity 1.5, 2.5mm 소프트층(PU 폼)Soft layer (PU foam) PU85K, 20mmPU85K, 20mm PU85K, 21mmPU85K, 21mm PU85K, 20mmPU85K, 20mm

실시예 3 내지 실시예 4와 비교예 3 : 흡차음재를 포함하는 대쉬 아이솔레이션 패드 상기 실시예 1의 차음재를 포함하는 차음층을 하기 표 2와 같은 조건, 및 하드층을 일정 두께로 열 프레스 성형 후 PU폼 몰드 발포를 통해 흡차음재를 포함하는 대쉬 아이솔레이션 패드를 제조하였다. Examples 3 to 4 and Comparative Example 3: Dash Isolation Pad Containing Sound Absorbing and Insulating Material The sound insulating layer containing the sound insulating material of Example 1 was subjected to the conditions shown in Table 2 below, and the hard layer was hot press-molded to a predetermined thickness. A dash isolation pad including a sound absorbing and insulating material was manufactured through PU foam mold foaming.

구분division 실시예3Example 3 실시예 4Example 4 비교예3Comparative Example 3 하드층hard layer 섬유층fiber layer PET 1400 g/㎡, 3.5mmPET 1400 g/m2, 3.5mm PET 1000 g/㎡, 3.5mmPET 1000 g/m2, 3.5mm PET 1400 g/㎡, 2.5mmPET 1400 g/m2, 2.5mm 차음층sound insulation layer TPE 비중 2.5, 1.5mmTPE specific gravity 2.5, 1.5mm TPE 비중 2.5, 1.5mmTPE specific gravity 2.5, 1.5mm TPE 비중 1.5, 2.5mmTPE specific gravity 1.5, 2.5mm 소프트층(PU 폼)Soft layer (PU foam) PU85K, 20mmPU85K, 20mm PU85K, 20mmPU85K, 20mm PU85K, 20mmPU85K, 20mm

물성 평가 방법 - 흡음 성능 평가 방법 : 챔버에 평판 시편 size 0.84m x 0.84m 시험 시편 또는 부품을 넣고, 400Hz~10,000Hz까지 15가지 음향 소스(source)를 입력하고 그 잔향에 대하여 소재의 흡음률을 측정하여 비교한다(ISO 354). Property evaluation method - Sound absorption performance evaluation method: Put a flat specimen size 0.84mx 0.84m test specimen or part in the chamber, input 15 sound sources from 400Hz to 10,000Hz, and measure the sound absorption rate of the material for the reverberation. Compare (ISO 354).

- 차음 성능 평가 방법 : 챔버에 평판 시편 size 0.84m x 0.84m 시험 넣고, 200개의 스틸볼을 롤러에 의해 가진시켜, 100Hz~10kHz의 투과 손실을 측정하여 비교하였다.- Sound insulation performance evaluation method: A flat specimen size 0.84m x 0.84m test was put in the chamber, 200 steel balls were excited by a roller, and transmission loss of 100Hz to 10kHz was measured and compared.

실험예 1 : 차음재 내 성분의 특성에 따른 물성 비교Experimental Example 1: Comparison of physical properties according to the characteristics of the components in the sound insulation material

실시예 1와 비교예 1-1 내지 비교예 1-4에 따라 제조한 차음재의 비중과 표면의 물성을 측정하고, 그 결과를 하기 표 3에 나타내었다.The specific gravity and surface properties of the sound insulating materials prepared according to Example 1 and Comparative Examples 1-1 to 1-4 were measured, and the results are shown in Table 3 below.

구분division 물성Properties 비중importance 표면surface 실시예 1Example 1 2.532.53 양호Good 비교예 1-1Comparative Example 1-1 1.51.5 양호Good 비교예 1-2Comparative Example 1-2 2.22.2 양호Good 비교예 1-3Comparative Example 1-3 2.42.4 양호Good 비교예 1-4Comparative Example 1-4 2.452.45 표면 크랙surface cracks

상기 표 3를 참조하면, 본 발명의 일 실시예에 따른 베이스 수지의 함량 및 무기필러를 BaSO4로 함량을 충족하는 실시예 1에 따른 차음재는 비중이 높으면서도 차음재 표면이 양호한 것을 확인할 수 있다. 반면, 본 발명의 일 실시예에 따른 베이스 수지의 함량을 충족시키지 않고 BaSO4 대신 CaCO3를 포함하거나(비교예 1-1), BaSO4 와 CaCO3를 함께 포함(비교예 1-2, 및 비교예 1-3)하여 제조한 차음재는 차음재의 표면은 양호하나 비중이 상대적으로 저하된다는 것을 확인할 수 있다. 또한, 본 발명의 일 실시예에 따른 무기필러의 조건을 모두 충족하였지만 베이스 수지의 함량을 충족시키지 않고 제조한 차음재에서는 비중이 상대적을 저하될 뿐 아니라 차음재 표면에 크랙이 발생한다는 것을 확인할 수 있다.즉, 본 발명의 일 실시예에 따른 차음재는 특유한 배합비율로 제조되어 두께를 줄이면서도 비중을 증대시킬 수 있고, 그에 따라 이를 포함하는 흡차음재 내 흡음층의 두께를 상대적으로 두껍게 증대시키면서도 비중을 줄일 수 있다는 장점이 있다.Referring to Table 3, it can be seen that the sound insulating material according to Example 1 satisfying the content of the base resin and the content of the inorganic filler with BaSO 4 according to an embodiment of the present invention has a high specific gravity and good sound insulating material surface. On the other hand, it does not satisfy the content of the base resin according to an embodiment of the present invention and contains CaCO3 instead of BaSO 4 (Comparative Example 1-1), or includes BaSO 4 and CaCO3 together (Comparative Examples 1-2, and Comparative Examples) 1-3), it can be seen that the surface of the sound insulating material is good, but the specific gravity is relatively decreased. In addition, it can be seen that in the sound insulating material that satisfies all the conditions of the inorganic filler according to an embodiment of the present invention but does not satisfy the content of the base resin, the specific gravity is relatively lowered and cracks occur on the sound insulating material surface. That is, the sound insulating material according to an embodiment of the present invention is manufactured at a unique mixing ratio, so that the specific gravity can be increased while reducing the thickness. There are advantages to being able to

실험예 2 : 흡차음재 내 흡음층인 섬유층 또는 소프트층의 두께 조절을 통한 평판평가Experimental Example 2: Evaluation of flatness by controlling the thickness of the fiber or soft layer, which is the sound absorbing layer in the sound absorbing and insulating material

실시예 2와 비교예 2-1 및 비교예 2-2에 따라 제조한 흡차음재의 중량, 흡음성능, 및 차음성능을 측정한 뒤 그 결과를 하기 표 4와 도 1a 및 도 1b에 나타내었다.The weight, sound absorption performance, and sound insulation performance of the sound absorbing and insulating materials prepared according to Example 2, Comparative Example 2-1 and Comparative Example 2-2 were measured, and the results are shown in Table 4 below and FIGS. 1A and 1B.

구분division 실시예 2Example 2 비교예 2-1Comparative Example 2-1 비교예 2-2Comparative Example 2-2 중량(g/㎡)Weight (g/m2) 4,6924,692 4,9524,952 4,6924,692 흡음 성능 (평균 흡음률)Sound Absorption Performance (Average Sound Absorption Coefficient) 0.370.37 0.310.31 0.330.33 차음 성능 (IL, dB)Sound insulation performance (IL, dB) 51.051.0 50.450.4 48.148.1

상기 표 4와 도 1a 및 도 1b을 참고하면, 기존 흡차음재인 비교예 2-2에 비해 섬유층의 두께를 1mm 증가시킨 실시예 2는 중량은 동일한 성능으로 유지하면서도, 흡음 성능 및 차음성능이 뛰어난 것을 확인할 수 있다. 반면, 기존 흡차음재인 비교예 2-2에 비해 소프트층의 두께를 1mm 증가시킨 비교예 2-2는 중량이 증가하면서도 흡음 성능은 오히려 감소하는 것을 확인할 수 있다.따라서, 비교예 2-2에 따라 제조된 흡차음재는 소프트층 두께 증가에 따라 하드층의 두께가 변화하므로 금형 수정이 필요하고 소프트층에 포함된 PU 폼 사용 증가로 중량 및 제조원가가 상승되는 단점이 있다. 반면, 실시예 2에 따라 제조된 흡차음재는 섬유층 및 차음층을 포함하는 하드층 두께가 일정하여 금형 수정이 필요없다. 따라서, 섬유층 두께 조절을 통해 제조한 본 발명에 따른 흡차음재는 기존 부품에 비해 중량 및 제조원가를 절감시키면서도 차음성능 및 흡음 성능을 향상시킬 수 있다는 장점이 있다.Referring to Table 4 and FIGS. 1A and 1B, Example 2, which increased the thickness of the fiber layer by 1 mm compared to Comparative Example 2-2, which is a conventional sound absorbing and insulating material, has excellent sound absorption and sound insulation performance while maintaining the same weight. that can be checked On the other hand, it can be seen that Comparative Example 2-2, in which the thickness of the soft layer was increased by 1 mm compared to Comparative Example 2-2, which is a conventional sound absorbing and insulating material, increased in weight, but the sound absorption performance was rather decreased. Therefore, in Comparative Example 2-2, The sound absorbing and insulating material manufactured according to this method has disadvantages in that the thickness of the hard layer changes as the thickness of the soft layer increases, so mold modification is required, and the weight and manufacturing cost increase due to the increase in the use of PU foam included in the soft layer. On the other hand, in the sound absorbing and insulating material prepared according to Example 2, since the thickness of the hard layer including the fiber layer and the sound insulating layer is constant, there is no need to modify the mold. Therefore, the sound absorbing and insulating material according to the present invention manufactured by controlling the thickness of the fiber layer has the advantage of being able to improve the sound insulation and sound absorption performance while reducing the weight and manufacturing cost compared to the existing parts.

실험예 3 : 흡차음재로 제조한 대쉬 아이솔레이션 패드의 부품평가Experimental Example 3: Evaluation of parts of dash isolation pad made of sound absorbing and insulating material

실시예 3 및 실시예 4와 비교예 3에 따라 제조한 아이솔레이션 패드의 중량, 흡음성능, 및 차음성능을 측정한 뒤 그 결과를 하기 표 5와 도 2a 내지 도 3b에 나타내었다.After measuring the weight, sound absorption performance, and sound insulation performance of the isolation pads prepared according to Examples 3 and 4 and Comparative Example 3, the results are shown in Table 5 and FIGS. 2A to 3B below.

구분division 실시예 3Example 3 실시예 4Example 4 비교예 3Comparative Example 3 중량(g/㎡)Weight (g/m2) 5,1505,150 4,7504,750 5,1505,150 흡음 성능 (평균 흡음률)Sound Absorption Performance (Average Sound Absorption Coefficient) 0.930.93 0.860.86 0.870.87 차음 성능 (IL, dB)Sound insulation performance (IL, dB) 27.627.6 27.127.1 26.426.4

상기 표 5와 도 2a 및 도 2b를 참고하면, 본 발명에 따른 흡차음재로 제조한 실시예 3의 대쉬 아이솔레이션 패드는, 종래기술 차음재로 제조한 비교예 3의 대쉬 아이솔레이션 패드에 비하여, 두께 및 중량은 동일하면서도 흡음 성능 및 차음성능이 더 우수한 것을 확인할 수 있었다. 또한, 상기 표 5와 도 3a 및 도 3b를 참고하면, 본 발명에 따른 흡차음재로 제조한 실시예 4의 대쉬 아이솔레이션 패드(실시예 3에 비하여 섬유층의 비중 400g/m2 감소)는, 종래기술 차음재로 제조한 비교예 3의 대쉬 아이솔레이션 패드에 비하여, 실시예 3에 비하여 섬유층의 비중 400g/m2 정도 감소했음에도 불구하고, 흡음 성능과 차음성능이 종래기술의 대쉬 아이솔레이션패드와 동등하거나 더 우수한 것을 확인할 수 있다.즉, 본 발명의 일 실시예에 따른 차음재는 특유한 배합비율로 제조되어 두께를 줄이면서도 비중을 증대시킬 수 있고, 그에 따라 이를 포함하는 흡차음재 내 흡음층의 두께를 상대적으로 두껍게 증대시키면서도 비중을 줄일 수 있으므로 기존 부품에 비해 중량 및 제조원가가 절감되면서도 차음성능 및 흡음 성능을 향상시킬 수 있다는 장점이 있고, 이에 따라 본 발명에 따른 흡차음재를 대쉬 아이솔레이션 패드, 터널패드, 또는 플로어 카페트에 적용하여 차량의 NVH(Noise, Vibration, Harshness) 성능 개선을 통해 소비자의 감성 품질 또한 만족시킬 수 있다.Referring to Table 5 and FIGS. 2A and 2B, the dash isolation pad of Example 3 made of the sound absorbing and insulating material according to the present invention has a thickness and weight compared to the dash isolation pad of Comparative Example 3 made of the sound insulating material of the related art. was the same, but it was confirmed that the sound absorption and sound insulation performance were better. In addition, referring to Table 5 and FIGS. 3A and 3B, the dash isolation pad of Example 4 (reduced by 400 g/m 2 of the specific gravity of the fiber layer compared to Example 3) made of the sound absorbing and insulating material according to the present invention is of the prior art. Compared to the dash isolation pad of Comparative Example 3 made of a sound insulating material, despite the decrease in the specific gravity of the fiber layer by about 400 g/m 2 compared to Example 3, the sound absorption performance and sound insulation performance were equal to or superior to those of the dash isolation pad of the prior art. That is, the sound insulating material according to an embodiment of the present invention is manufactured at a unique mixing ratio, so that the specific gravity can be increased while reducing the thickness, and thus the thickness of the sound absorbing layer in the sound absorbing and insulating material including the sound absorbing and insulating material is relatively increased. It has the advantage of being able to reduce weight and manufacturing cost compared to existing parts and improve sound insulation performance and sound absorption performance because it can reduce specific gravity while By applying it, it can also satisfy the emotional quality of consumers by improving the NVH (Noise, Vibration, Harshness) performance of the vehicle.

Claims (15)

열가소성 올레핀(Thermoplastic olefin; TPO), 및 폴리올레핀 엘라스토머(Polyolefin elastomer; POE)를 포함하는 베이스 수지 16~24중량%; 및
무기필러 76~84중량%를 포함하는 차음재.16 to 24 wt% of a base resin including a thermoplastic olefin (TPO), and a polyolefin elastomer (POE); and
A sound insulating material containing 76 to 84% by weight of inorganic fillers. 제1항에 있어서,
상기 베이스 수지는 차음재 전체 중량을 기준으로
상기 TPO 11~16중량%; 및
상기 POE 5~8중량%를 포함하는 차음재.The method of claim 1,
The base resin is based on the total weight of the sound insulation material.
11 to 16% by weight of the TPO; and
A sound insulating material comprising 5 to 8% by weight of the POE. 제1항에 있어서,
상기 TPO의 용융지수(Melt index; MI)는 15~25g/10분인 것인 차음재.The method of claim 1,
The TPO has a melt index (MI) of 15 to 25 g/10 min. 제1항에 있어서,
상기 TPO는 저밀도 폴리에틸렌(Low Density Polyethylene; LDPE), 선형 저밀도폴리에틸렌(Linear Low Density Polyethylene; LLDPE), 고밀도 폴리에틸렌(High Density Polyethylene; HDPE), 에틸렌 비닐아세테이트(Ethylene Vinyl Acetate; EVA), 및 에틸렌 프로필렌 고무(EPM, EPDM)로 이루어진 군으로부터 선택된 1종 이상을 포함하는 차음재.The method of claim 1,
The TPO is low density polyethylene (Low Density Polyethylene; LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE), ethylene vinyl acetate (Ethylene Vinyl Acetate; EVA), and ethylene propylene rubber A sound insulating material comprising at least one selected from the group consisting of (EPM, EPDM). 제1항에 있어서,
상기 POE의 용융지수(Melt index; MI)는 25~35g/10분인 것인 차음재.The method of claim 1,
The POE has a melt index (MI) of 25 to 35 g/10 min. 제1항에 있어서,
상기 POE는 에틸렌-부텐(ethylene-butene) 공중합체, 및 에틸렌-옥텐(ethylene-octene) 공중합체로 이루어진 군으로부터 선택된 1종 이상을 포함하는 차음재.The method of claim 1,
The POE is an ethylene-butene (ethylene-butene) copolymer, and an ethylene-octene (ethylene-octene) sound insulating material comprising at least one selected from the group consisting of copolymers. 제1항에 있어서,
상기 무기필러는 황화바륨(BaSO4)을 포함하는 차음재.The method of claim 1,
The inorganic filler is a sound insulating material comprising barium sulfide (BaSO 4 ). 제1항에 있어서,
상기 무기필러는 입경이 5μm 이하인 것인 차음재.The method of claim 1,
The inorganic filler is a sound insulation material having a particle diameter of 5 μm or less. 제1항에 있어서,
비중이 2.5 이상인 차음재.The method of claim 1,
Sound insulation material with a specific gravity of 2.5 or more. 제1항의 차음재를 포함하는 차음층과 상기 차음층 상의 일면에 위치한 섬유층을 포함하는 하드층; 및
상기 차음층 상의 타면에 위치한 소프트층을 포함하는 흡차음재.a hard layer comprising a sound insulating layer comprising the sound insulating material of claim 1 and a fibrous layer disposed on one surface of the sound insulating layer; and
and a soft layer positioned on the other surface of the sound insulating layer. 제10항에 있어서,
상기 섬유층의 두께는 2.5~5mm인 것인 흡차음재.11. The method of claim 10,
and the thickness of the fiber layer is 2.5 to 5 mm. 제10항에 있어서,
상기 섬유층의 비중은 800~1400g/cm2인 것인 흡차음재.11. The method of claim 10,
The specific gravity of the fiber layer is 800 to 1400 g/cm 2 A sound absorbing and insulating material. 제10항에 따른 흡차음재를 포함하는 대쉬 아이솔레이션 패드. A dash isolation pad comprising the sound absorbing and insulating material according to claim 10 . 제10항에 따른 흡차음재를 포함하는 터널패드.A tunnel pad comprising the sound absorbing and insulating material according to claim 10 . 제10항에 따른 흡차음재를 포함하는 플로어 카페트.A floor carpet comprising the sound absorbing and insulating material according to claim 10 .
KR1020200134213A 2020-10-16 2020-10-16 Sound insulating material with improved sound insulation performance, and sound absorbing and insulating material comprising the same KR20220050480A (en)

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KR101411398B1 (en) 2012-11-02 2014-06-25 주식회사 부림케미칼 Noise absorption and insulation materials and Producing Method

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US20030211280A1 (en) * 1997-02-28 2003-11-13 Shaw Industries, Inc. Carpet, carpet backings and methods
KR100559577B1 (en) * 2003-07-08 2006-03-10 현대자동차주식회사 A soundproofing composition of low specific gravity
BRPI0717172A2 (en) * 2006-08-25 2013-10-15 Sachtleben Chemie Gmbh COMPOSITE CONTAINING BARIUM SULFATE
JP6069052B2 (en) * 2013-03-19 2017-01-25 日東電工株式会社 Anti-vibration material, anti-vibration structure and anti-vibration method
EP2937859B1 (en) * 2014-04-23 2022-08-10 Hyundai Motor Company Dash pad for vehicle

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